Sometimes when somebody asks me to surrender, and I know I've lost, I post this link, then I play for a few more turns.
http://www.youtube.com/watch?v=ocnrPLKbkD0
If they get especially angry with me, I'll make the game go another 10 minutes or so. If they laugh at the utter comedy of posting a Corey Hart video, then I keep it to about 2 minutes more.